Andrew downward



(No Model.)

Y A. DOWNWARD.

HARROW. y

No. 413.498. l Patented Oct. 224, 1,889'.

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UNiTnD STATES l PATENT OFFICE, i

ANDREW DOWNVVARD, OF UTICA, YORK, ASSIGNOR THE EUREKA MOVVER` COMPANY, OF SAME PLACE.

HAR Row.

SPECIFICATION forming part of Letters Patent No. 413,498, dated October 22, 1889.

Application iiled May 20, 1889.

.To @ZZ whom, it may concern.'

Be it known that I, ANDREW DowNwARD,

of Utica, in the county of Oneida, in the State of New York, have invented new and useful Improvements in I-Iarrows, of which the fol lowing, taken in connection with the accom'- panying drawings, is a full, clear, and exact description. r

This invention relates to the class of harrows which are equipped with curved spring-teeth and the invention consists in improved means for attaching said teeth to the frame, as here` inafter fully described, and specifically set forth in the claims.

In the accompanying drawings, Figure l is a plan view of a harrow pertaining to t-he class hereinbefore mentioned. Fig. 2 is an enlarged vertical longitudinal section on line ze, Fig. l. Fig. 3 is a furt-her enlarged side view of the attachment of the tooth to the frame. Fig. 4 is a View of the aforesaid attachment, taken in a plane at right angles to that represented in Fig. 3. Figs. 5 and 6 are vertical transverse sections, respectively, on lines Qc, Fig. 3, and y y, Fig. 4; and Fig. 7 is a longitudinal vertical section of the attachment of the tooth to the barrow-frame at the point of the crossing of the draft-bars and the bed-pieces of the frame.

Similar letters of reference indicate corresponding parts.

A A represent, respectively, the draft-bars and sol-called bed-pieces, which are firmly secured to each other in the usual manner to form the frame of the harrow. The draftbars A A, I prefer to form of metal and with longitudinal channels c in their under sides for the purpose of obtaining maximum rigidity with minimum weight of metal.

The att achment of the tooth consists, mainly, of a shoe a, preferablyy cast in one piece of metal and formed with transverse passages b b, extending through the shoe'and intersect` ing each other inside of said shoe. Through Serial No. 311,352. (No model.)

the tooth-shank rests, as illustrated in Fig. 6 of the drawings.

Between the bar and underlying tooth-shank I interpose a block e, which is seated in the longitudinal channel c of the draft-bar and bears on the tooth-shank between the aforesaid cross-bars d d.

In order to prevent the said block from slipping laterally on the tooth-shank, I form said block with downward projections c e', which 6o abut against opposite edges of the tooth-shank. The shoe is also formed with a screw-threaded eye through its top and at right angles to the plane of the passages b b', and in said eye is inserted a set-screw 71., which bears upon the r top of the inclosed portion of the draft-barA and presses the block-c firmly upon the toothshank, while the latter rides on the cross-bars d d of the shoe, and thus said tooth-shank is iirmly clamped in the shoe.

For attaching the tooth to the barrow-frame at the crossings of the bed-pieces and draftbars, I form the shoe av of a sufficient depth to receive through it the aforesaid portions of the frame with the block c and underlying tooth-shank C, as represented in Fig. 7 of the drawings. All of said parts are clamped in the shoe by the set-screw h, in the manner hereinbefore stated.

` What I claim isl. In combination with the frame-bar and tooth, a block interposed between said parts and rigidly confined on the frame-bar, a shoe embracing said frame-bar, tooth, and block,

and a set-screw connected to the shoe and ,clamping therein the aforesaid parts, as set forth.

2. ln combination with the curved springtooth, a block interlocked with the edges of said tooth, the frame-bar interloc'ked with the 9o said block at the edges at rightangles to the edges of the tooth, a shoe e bracing said parts, and a set-screw connecte to the shoe and clamping therein the aforesaid frame-bar, tooth, and intervening block, substantially as set forth.

` 3. The combination of a harrow-frame having draft-bars channeled longitudinally in their under sides, shoes encompassing said bars, teeth inserted with their attachingroo through the other of the aforesaid passages, a block seated in the channel of the draft-bar and interposed between said bar and toothshank and formed with downward projections at opposite edges of the tooth-shank, and a `zo set-screw inserted in the screvwthreaded eye of the shoe and clamping in said shoe the parts encompassed therein, substantially as described and shown.

In testimony whereof I have hereunto signed 2 5 my name this 14th day of May, 1889.

ANDREV DOWNWARD. lVitnesses:

M. W. Ross, A. E. COLE. 

